公开(公告)号：US09476989B2

公开(公告)日：2016-10-25

申请号：US14254285

申请日：2014-04-16

Applicant: Honeywell International Inc.

Inventor： James B. Broderick ,  Lawrence Charles Vallot

IPC: G01S19/23 ,  G01S19/47 ,  G01S19/00

CPC classification number: G01S19/47 ,  G01S19/23

Abstract: A navigation system comprises a GNSS receiver that receives GNSS signals on multiple tracking channels, an INS that generates inertial data, and a processor. A micro jump detection and correction module comprises an oscillator micro jump detector that monitors estimates of C/N0 in all tracking channels, and detects a micro-jump event when there is an abrupt decrease of C/N0 in all tracking channels. An offsets module defines a plurality of carrier NCO command offsets to search over signal Dopplers in all available tracking channels after the micro jump event is detected, and sends the carrier NCO command offsets to the GNSS receiver to be added to nominal carrier NCO commands. The micro jump detector selects a tracking channel with the highest C/N0 after carrier NCO command offsets are added to nominal carrier NCO commands, computes corrections for clock error estimates, and sends the corrections for the clock error estimates to a GNSS/inertial Kalman filter.

Abstract translation: 导航系统包括在多个跟踪信道上接收GNSS信号的GNSS接收器，产生惯性数据的INS和处理器。 微跳检测和校正模块包括振荡器微跳跃检测器，其监视所有跟踪信道中的C / N0的估计，并且当所有跟踪信道中的C / N0都突然下降时检测微跳事件。 偏移模块定义多个载波NCO指令偏移量，以在检测到微跳跃事件之后在所有可用的跟踪信道中搜索信号多普勒，并将载波NCO指令偏移发送到GNSS接收机以添加到标称载波NCO命令。 微型跳转检测器选择具有最高C / N0的跟踪通道，在载波NCO命令偏移量加到标称载波NCO命令之后，计算时钟误差估计的校正，并将时钟误差估计的校正发送到GNSS /惯性卡尔曼滤波器 。

公开(公告)号：US20150301188A1

公开(公告)日：2015-10-22

申请号：US14254285

申请日：2014-04-16

Applicant: Honeywell International Inc.

Inventor： James B. Broderick ,  Lawrence Charles Vallot

IPC: G01S19/29

CPC classification number: G01S19/47 ,  G01S19/23

Abstract: A navigation system comprises a GNSS receiver that receives GNSS signals on multiple tracking channels, an INS that generates inertial data, and a processor. A micro jump detection and correction module comprises an oscillator micro jump detector that monitors estimates of C/N0 in all tracking channels, and detects a micro-jump event when there is an abrupt decrease of C/N0 in all tracking channels. An offsets module defines a plurality of carrier NCO command offsets to search over signal Dopplers in all available tracking channels after the micro jump event is detected, and sends the carrier NCO command offsets to the GNSS receiver to be added to nominal carrier NCO commands. The micro jump detector selects a tracking channel with the highest C/N0 after carrier NCO command offsets are added to nominal carrier NCO commands, computes corrections for clock error estimates, and sends the corrections for the clock error estimates to a GNSS/inertial Kalman filter.

Abstract translation: 导航系统包括在多个跟踪信道上接收GNSS信号的GNSS接收器，产生惯性数据的INS和处理器。 微跳检测和校正模块包括振荡器微跳跃检测器，其监视所有跟踪信道中的C / N0的估计，并且当所有跟踪信道中的C / N0都突然下降时检测微跳事件。 偏移模块定义多个载波NCO指令偏移量，以在检测到微跳跃事件之后在所有可用的跟踪信道中搜索信号多普勒，并将载波NCO指令偏移发送到GNSS接收机以添加到标称载波NCO命令。 微型跳转检测器选择具有最高C / N0的跟踪通道，在载波NCO命令偏移量加到标称载波NCO命令之后，计算时钟误差估计的校正，并将时钟误差估计的校正发送到GNSS /惯性卡尔曼滤波器 。